862255221 has 16 divisors (see below), whose sum is σ = 1182941760. Its totient is φ = 558351360.

The previous prime is 862255193. The next prime is 862255237. The reversal of 862255221 is 122552268.

It is a happy number.

It is not a de Polignac number, because 862255221 - 2⁵ = 862255189 is a prime.

It is a super-2 number, since 2×862255221² = 1486968132283517682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862255241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4885 + ... + 41813.

It is an arithmetic number, because the mean of its divisors is an integer number (73933860).

Almost surely, 2^862255221 is an apocalyptic number.

It is an amenable number.

862255221 is a deficient number, since it is larger than the sum of its proper divisors (320686539).

862255221 is a wasteful number, since it uses less digits than its factorization.

862255221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37156.

The product of its digits is 19200, while the sum is 33.

The square root of 862255221 is about 29364.1826210096. The cubic root of 862255221 is about 951.7990731980.

The spelling of 862255221 in words is "eight hundred sixty-two million, two hundred fifty-five thousand, two hundred twenty-one".